1.050 TI Valve Spring Retainer - 10 Degree

The PAC Racing Springs 1.050 TI Valve Spring Retainer – 10 Degree is a precision-engineered titanium component designed for high-performance engine builds where valve spring control and weight reduction are critical. Built from titanium for the 400 series engine family, this retainer is engineered to manage dual spring configurations while maintaining the tight tolerances required in competitive and high-revving applications. The 10-degree angle geometry and 1.050-inch dual spring specification work together to optimize spring seating and load distribution across the valve stem interface.

This retainer features stepped OD dimensions of 1.040 inches and 0.715 inches, precision specifications that ensure correct interface with both the valve spring and the cylinder head pocket. Titanium construction delivers measurable weight savings compared to steel alternatives—critical in applications where rotating assembly mass directly impacts engine response and durability. The material also resists the thermal cycling stress common in high-RPM environments, making it suitable for racing engines, performance builds, and applications demanding extended valve train life under demanding conditions. Each retainer is manufactured to PAC Racing Springs' exacting standards for concentricity and surface finish.

Builders and engine shops specify PAC valve spring retainers when assembling 400 series engines for oval track racing, drag racing, street performance, and marine applications. The 10-degree configuration is a proven geometry for managing spring pressure while allowing valve lift without bind. This is a single retainer—confirm your complete valve train kit requirements before ordering, including springs, keepers, and seat inserts. Proper installation requires precision tools and knowledge of your specific engine's valve geometry and clearance specifications.